Got my fourtrax out yesterday after sitting for 3 weeks. Was running a little rough when I loaded it, but only had it on for 30 seconds and didn’t let it warm up. Shortly into the ride, started sputtering at higher rpms. Kept them low and kept moving. Soon started sputtering at all rpms. Then wouldn’t even move with a person on it. Will not idle. Walking beside it, at full throttle in 1st gear, it will crawl. Haven’t cleaned the carb in a year, so that will probably be my first try. Any other ideas?